Damper-regulator



naires stares .FRANK GRAY, OF PHILADELPI-IlA, PENNSYLVANIA.

DAIVIPER-REGULATOR.

i naeegefes.

To all whom t may concern.'

Be it known that I, FRANK GRAY, a citizen of the United States, residingat Philadelphia, in the county of Philadelphia and State ofPennsylvania., have invented new and useful Improvements inDamper-Begulators, of which the following is a specification.

This invention relates to stoves and furnaces, particularly to dampercontrol means, and has for its object the provision of a fiuid pressureoperated device including differential pistons connected with a dampercontrol lever, the lever being weighted whereby the damper will not bemoved until steam pressure exceeds a certain predetermined amount.

An importa-nt object is theprovision of a device of this character whichwill be simple and inexpensive in manufacture and installation, whichwill be entirely automatic in operation, eliicient and durable inservice, and a general improvement in the art.

`With the above and other objects and advantages in view, the inventionconsists in the details of construction to be hereinafter more fullydescribed and claimed, and illustrated in the accompanying drawings inwhich- Figure 1 is a longitudinal sectional view of my device,

Fig. 2 is a central vertical cross sectional view.

F ig. 3 is a horizontal sectional view taken on the line 8 3 of Fig. 2.

Fig. 4e is a side elevation of a furnace showing my device associatedtherewith.

Referring more particularly to the drawings, tlie numeral 10 designatesa casing which may conveniently be formed as a single casing formed inits lower portion with a reservoir space 11 within which is disposedoil, and formed in its upper portion with a pair of cylinders 12 and 13,of somewhat different diameters, .13 being the smaller. The centralportion of the casing above the reservoir space 11 is provided with apassage 14 into which leads the steam pipe from tlie'boiler of a furnacewhose damper is to be regulated. Formed upon the top of the casing 10 isan extension 15 upon which is pivoted, as shown at 16, a lever 17 whichis connected with the damper to be controlled and' which carries anadjusting Weight 18.

Slidable within the cylinders 12 and 13 Specification of Letters Patent.

Application led ctober 11, 1919.

yenter the ,fietitiiti r@mit@E..

raten/tea Nev. 2e, ieei. Serial No. 329,923.

are pistons 19 and 20, respectively, which are provided with rods 21pivotally connected with the lever 17.

In the operation of the device, steam from the boiler of the furnace tohe regulated will passage 14 and will place the oil within the reservoir11 under pressure, forcing the oil upwardly into the cylinders 12 and13. Owing to the di'erence in diameter and consequently the area of thepistons, there will be dierent pressures exerted upon them in proportionto the area so that there is ordinarily a tendency to move one pistonupwardly farther than the other one. This tendency is counter-acted bythe adjustable weight 18 which the lever 17 to such position that theposition of the lever 17 and consequently the damper, will not bechanged until the steam pressure entering the passage 14, exceeds acertain predetermined degree. When such excessive pressure occurssuflicient to overcome the balancing effect of the weight 18, the lever17 will be moved and the Vdamper will be closed. Y

F rom the foregoing description and a study of the drawings it will beapparent that l have thus provided a simple and inexpensive automaticdamper control device which is operated entirely by steam pressurewithin the boiler of the furnace to be regulated, and it will beapparent that adjustment may be made to vary the susceptibility of thedevice within a wide range, in an extremely simple and eicient'manner.

While I have shown and described the preferred embodiment of myinvention, it is of course to be understood that I reserve the right tomake such changes in the form, construction, and arrangement of parts aswill not depart from the spirit of the invention or the scope of thesubjoined claims,

Having thus described my invention, I

claim:

1. In combination with a furnace and its boiler, the furnacebeingprovided with a damper, a regulator comprising a casing containinga liquid adapted to be placed under pressure by steam generated withinthe boiler of the furnace, a pair of pistons disposed within said casingand arranged to be acted upon by the liquid therein under pressure, saidpistons being of different diameters, and a lever connected with thedamper and connected with said pistons at opposite sides of its fulcrum.

may be slid along 2. ln combination with a 'furnace having a boiler anda damper, a regulating device comprising a casing having its lowerportion formed as a liquid reservoir, said casing being provided with asteam passage communieating with said reservoir and connected with theboiler of the furnace, a pair of cylinders of different diameters formedin said casing and communicating with said reservoir, a lever connectedwith the damper 10 and pivoted upon said casing, pistons disy posedWithin said cylinders and Vconnected with said'lever at opposite sidesof its fulcrum, and a Weight slidable upon said lever;

In testimony whereof I aflix my signature. 15

f a FRANK GRAY.

